Question
A container holds 640 litres of a solution of milk and
water in the ratio 3:5. If (x + 20) litres of water is added, the new ratio of milk to water becomes 3:7. What is the value of x?Solution
ATQ,
Quantity of milk initially in container = (3/8) × 640 = 240 litres Quantity of water initially in container = (5/8) × 640 = 400 litres According to question, 240 / [400 + (x + 20)] = 3 / 7 ⇒ 240 × 7 = 3 × (420 + x) ⇒ 1680 = 3 × (420 + x) ⇒ 1680 = 1260 + 3x ⇒ 3x = 420 ⇒ x = 140
564.932 + 849.029 – 425.08 = 612.095 + ?
999.99 + 99.99 + 99= ?
A sum of ₹60,000 is invested at a compound interest rate of 'x%' per annum, compounded annually, and grows to ₹75,264 in 2 ye...
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
³√? × 33.97 + 59.99 × 28.9 – 48.98 × 21.42 = 1085.344
1279.98 ÷ 40.48 × 10.12 = ? × 2.16
(124.901) × (11.93) + 219.95 = ? + 114.891 × 13.90
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
Relevant for Exams:
